US 12,442,465 B2
Valve driving with mechanical delay
Mateus Henrique Ferreira De Araujo, Rio de Janeiro (BR)
Assigned to Petróleo Brasileiro S.A.—Petrobras, Rio de Janeiro (BR)
Filed by Petróleo Brasileiro S.A.—Petrobras, Rio de Janeiro (BR)
Filed on Dec. 22, 2022, as Appl. No. 18/087,415.
Claims priority of application No. 10 2021 026233 8 (BR), filed on Dec. 23, 2021.
Prior Publication US 2023/0204124 A1, Jun. 29, 2023
Int. Cl. F16K 31/40 (2006.01); F15B 21/10 (2006.01)
CPC F16K 31/406 (2013.01) [F15B 21/10 (2013.01); F15B 2211/3056 (2013.01); F15B 2211/40584 (2013.01); F15B 2211/5151 (2013.01); F15B 2211/8623 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A valve driver with a mechanical delay, the valve driver comprising;
two directional valves, each of the two directional valves having three ways and two positions, each of the two directional valves actuated by an electrical solenoid;
a three-way, two-position directional valve actuated by a pneumatic pilot fluidically coupled and actuable by the two directional valves;
a set of compressed air conditioning with filter and pressure regulating valve;
an accumulator vessel;
flowrate adjustment valve arranged and configured to regulate a flowrate from the accumulator vessel;
a check valve arranged and configured to allow flow into the accumulator vessel.